|For other characters named Zack, see Zack.|
Zack is a deceased employee of Freddy Fear's House of Scares found dead in the hallway connecting the costume shop to the restaurant.
Zack performed costume shows and had full access to the store's supply of costumes. He devised a plan with his friends, the Parsons, to borrow monster costumes and scare Shelby O'Rourke in her shack during the dead of night.
Zack appears only in Fallout 76.